Remote Reference Layer
- RR Lyrae star
noun 1. Astronomy. one of a group of pulsating variable stars found in the halo of the Milky Way, with periods between 1.2 and 30 hours; all have approximately the same luminosity and are therefore used for measuring distances.
- Royal assent
noun 1. (in Britain) the formal signing of an act of Parliament by the sovereign, by which it becomes law
noun 1. the third prong from the base of a stag’s antler.
noun 1. a variety of sweet cherry having yellow fruit tinged with red.